Improvement in machines for dovetailing- window-sash



N. PETERS, PHOTO-L THOGRAP gaat entre.'

nn WITT' o. SMITH, or IyION'IeOIIInRr, ILLINOIS.-

Letters Patent No. 10 7,555, dated September 20, 1870.

IMPRGVEMENT IN MACHINES FOR. DOVETAILING- WINDOW-SASH.

The Schedule referred to in these Letters APatent and making part of thesame.

To all lwhom it may concern Y Be it known that I,'DE WITT C. SMITH, ofMontgomery, in the county of Kane and State of Illinois, haveinvented anew and useful Improvement in VMachines for Dovetailing Window- Sashes;Aand I do hereby declare that the following is a full, clear, and exactdescription thereof', which will enable others skilled in the art tomake and use the same, reference being had to the accompanying drawingformngpari of this specilication, in which- Figure l represents a sideelevation of my improved machine;

Figure 2 'represents a plan view, with a part broken away;

Figures 3, 4, 6, and' 7 represent detachabletables, provided withguides, adapted to present the diiierent pieces properly to the saws;

Figure 5 represents the manner of' presenting the y meeting-rail of `thebottom sash to the saw B; and

Figure 8 lrepresents the ends of check-meeting rails after they havepassed through the tenoning-Inachine. Similar lettersfof referenceindicate like parts.

The'object of this invention is to provide a simple machine for formingthe dovetail tenons, and slots `for joining-the frames of window-sash.

Y 1t consists in the arrangement ot' the adjustable table, detachablebed, adjustable spring stops, and the guides, with reference to the`saws mounted upon a horizontal arbor, as will be hereinafter more fullydescribed. `.A represents a saw-mandrel arranged on a suitable bench,and provided with three s a'ws, B, C, and D, which are designed to be ofabout the thickness of the narrowest part of the slots in the stiles..

E represents a table arranged on the frame in front of the saws,andprovided 'with guides adjnstably connected thereto, for governing theposition of the difierent parts as they are presented to the saw.

F represents a guide, against which. the stile is guided to cut thestraight side of the slot, as shown in red in iig. 2. It is shoved'in,against the saw until the adjustable stop Gr, on the guide F, drops intothe mortise for the cross-bar of the sash, as shown at y, which has beenpreviously made. 'lhe stile is then withdrawn, and the other endpresented, with the other side up, in the saine manner, until a' springs'top, H, laying ou the face of the table, drops into-v the saidniortise. The stile is then presented, in the same manner, to the saw Cby the inclined guides I or K, for sawing the Ydovetailed side of theslot. As

the saws are as thick asthe nairowest part of the' slot, and as thewidest part is not more than twice as wide as the said narrow part.I thesaws will remove all the stock necessary to complete the said slots.

M represents spring guidesfor pressing the material against the side ofthe guides.

N represents a guard hinged to the frame to protect the operator fromthe saws.

For sawing the bottom and top rails, and the mecting rails,detachablet-ables may be provided, with guides, especially designed andadapted to the. several parts which may befcqnnectedto the table inplace of that part, 0, of it to which the guides I and K lare connected,which is made detachable-for the purpose. Y

, For this purpose the above 'railsl are first passed through atenoning-machine in the usual manner for making a tenon, except thecheck-meeting rails, which are only cut on one side far enough to form ashoulder,

with a cope, to tit the bead Or molding on the stiles,

as seen in iig. 8, which shows the meeting rail fonthe bottom sash.

This rail is then presented to the saw B, as represented. in iig. 5,where F represents Vthe guide, as-

shown in iig. 1, and sawed in a distance equal to the recess on theother side, shown by the dotted lines x. It is then transferred to oneof the before-mentioned detachable portions ot' the table, as shown iniig. 4,

chine, and the recess cut is thereby inclined on that side whichconstitutes the face of the tenon, as shown, atzvz, ing. 3.

The end ofthe rail isthen'presented to the saw D and the vertical sideof the tenon formed, a detachable table, S, providedwith a verticalguide, T, being used; but, the s'lot thus formed by the saw not being'of sufficient width, the rail is again moved to the saw .When the slotis widened to the line marked 2:, inv

iig, 3, both ends of this rail may be finished by the saws D and B byturning them bottom-side up as, they are reversed endwise. After thisthey are passed through the molding-machine and finished.

For forming the -ends of the bottom and top rails, and the plain meetingrails, the detachable tables U and V, provided with the inclined gu'idesW and Y, are used, by which all the material may be cut away to form thetenou by removing them from the saw D vto the saw C.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent- The arrangementof' the adjustable table E, ydetachable bed O, guides F I K, adjustablespring stops H G, and. spring guides M, and the saws B G D,

mounted upon the horizontal arbor A, all constructed and Operating asdescribed, for the purpose specified.

' D. W. G. SMITH. Witnesses:

V. A. WATKLNs MfM. WATKINS.

an inclined

